Chem prac report student analysis

[noneofyourbusiness]

Hi everyone,

I know there has been heaps of questions relating to the extend experimental investigation but I am unsure about the student report/discussion bit at the end. I have done all the pracs but must now compare which methods was best, problems encountered etc, (we analysed fertiliser). However I know in my pracs my calculations were wrong so how I can I effectively compare different methods (gravimetric, acid-base titration, redox titration and colorimetry) if my results were wrong.

Thank you